This O.W.L. will determine how well-versed you are with J.K. Rowling’s Harry Potter series

It’s been two decades since acclaimed author, J.K. Rowling, first published Harry Potter and the Sorcerer’s Stone and yet, Potterheads still can’t get over it. Since our fave boy wizard and his creator recently turned a year older (last July 31), let’s reminisce the lines that made us laugh, made us say “Take that, Malfoy!” and made our hearts swell with joy.

Take this quiz and discover how well you know these famous lines from the Harry Potter book series!